On the other "lesser" side after Champion it begins with "Adept" but that's as far as I've gotten Sarah (need more practice on hit throws). I guess Grandmaster and Battlelord are on that branch, I'm not sure.

There are actually other lords as well. After Subjugator, you can either go to Stormlord(the higher ranking) or Demonlord(the lower ranking). I believe in order to move to Stormlord from subjugator you have to win 10 consecutive matches over the same class and just 12 matches to move to Demonlord